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// Copyright (c) 2016-2024 Antony Polukhin
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_PFR_DETAIL_RVALUE_T_HPP
#define BOOST_PFR_DETAIL_RVALUE_T_HPP
#pragma once
#include <type_traits>
#include <utility> // std::enable_if_t
// This header provides aliases rvalue_t and lvalue_t.
//
// Usage: template <class T> void foo(rvalue<T> rvalue);
//
// Those are useful for
// * better type safety - you can validate at compile time that only rvalue reference is passed into the function
// * documentation and readability - rvalue_t<T> is much better than T&&+SFINAE
namespace boost { namespace pfr { namespace detail {
/// Binds to rvalues only, no copying allowed.
template <class T
#ifdef BOOST_PFR_DETAIL_STRICT_RVALUE_TESTING
, class = std::enable_if_t<std::is_rvalue_reference<T&&>::value>
#endif
>
using rvalue_t = T&&;
/// Binds to mutable lvalues only
}}} // namespace boost::pfr::detail
#endif // BOOST_PFR_DETAIL_RVALUE_T_HPP
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